if (process.argv.length <= 2) {
    console.log("Fetch interactions of address\nUsage node TODO.js [address]");
    process.exit();
}
const FloweeServices = require('../');
var Flowee = new FloweeServices();

function printDate(timeInSeconds) {
    let date = new Date(timeInSeconds * 1000); // JS wants milliseconds.
    var answer = date.getUTCDate() + "/" + (date.getUTCMonth() + 1);
    while (answer.length < 5)
        answer = " " + answer;

    // JS misses 'getUTCYear' :(
    let y = date.getUTCFullYear() - 2000;
    answer += "/" + y;

    return answer;
}

function listInteractions(address) {
    // search request passes an object literal
    var promise = Flowee.search({
        jobs: [
            {   // Get all transactions based on the following address
                value: address,
                type: Flowee.Job.LookupByAddress,
            }
        ],

        // don't fetch items twice, remember which ones we created jobs for
        requests: {
            headers: {},
            tx: {}
        },

        // private method to avoid fetching blockheaders multiple times.
        fetchHeader: function(blockHeight) {
            if (typeof this.requests.headers[`${blockHeight}`] === 'undefined') {
                this.requests.headers[`${blockHeight}`] = true;
                this.addJob({
                    type: Flowee.Job.FetchBlockHeader,
                    value: blockHeight,
                });
            }
        },

        fetchTxOutputs: function(txid) {
            if (typeof this.requests.tx[`${txid}`] === 'undefined') {
                this.requests.tx[`${txid}`] = true;
                this.addJob({
                    type: Flowee.Job.FetchTx,
                    value: txid,
                    txFilter: [
                        Flowee.IncludeOutputAmounts,
                        Flowee.IncludeOutputAddresses
                    ]
                });
            }
        },

        onAddressUsedInOutput: function(blockHeight, offsetInBlock, outIndex) {
            this.fetchHeader(blockHeight);

            this.addJob({
                type: Flowee.Job.FetchTx,
                value: blockHeight,
                value2: offsetInBlock,
                txFilter: [
                    Flowee.IncludeTxid,
                    Flowee.IncludeOutputAmounts,
                    Flowee.IncludeOutputAddresses,
                    Flowee.IncludeInputs
                ],

                // the next one is for myself, not the framework.
                outIndex: outIndex
            });
        },

        onTxAdded: function(transaction) {
            let jobId = transaction.jobId;
            let job = this.jobs[jobId];
            // If outIndex was defined this is one of the tx's we got from the
            // address-search because we added it in onAddressUsedInOutput()
            if (typeof job.outIndex !== 'undefined') {
                transaction.isMain = true;
                transaction.outIndex = job.outIndex;
                for (let i = 0; i < transaction.inputs.length; ++i) {
                    if (i == 6) break; // no need to show more inputs.
                    // input is really just a link to another Tx, fetch its outputs.
                    this.fetchTxOutputs(transaction.inputs[i].previousTxid);
                }
                for (let i = 0; i < transaction.outputs.length; ++i) {
                    if (i >= 6) {
                        if (job.outIndex >= i)
                            i = job.outIndex;
                        else
                            break;
                    }
                    this.addJob({
                        type: Flowee.Job.LookupSpentTx,
                        value: transaction.txid,
                        value2: i
                    });
                }
            } else {
                // anything not from the address search should be made easy to find.
                this[`${transaction.txid}`] = transaction;
                this.fetchHeader(transaction.blockHeight);
            }
        },

        onSpentOutputResolved: function(jobId, blockHeight, offsetInBlock) {
            if (blockHeight != -1) { // it was spent.
                let job = this.jobs[jobId];
                this[`out${job.value}${job.value2}`] = blockHeight;
                this.fetchHeader(blockHeight);
            }
        },

        onFinished: function() {
            console.log("Transactions that interacted with address: " + address);

            for (num in this.transactions) {
                let tx = this.transactions[num];
                if (tx.isMain) {
                    let header = this[`block${tx.blockHeight}`];
                    console.log();
                    console.log(printDate(header.time) + " (block: " + tx.blockHeight
                        + ") txid: " + tx.txid);

                    for (let i = 0; i < tx.inputs.length; ++i) {
                        if (i == 6) {
                            console.log("   " + (tx.inputs.length - i)
                                + " more inputs not shown");
                            break;
                        }
                        if (tx.isCoinbase) {
                            let header = this[`block${tx.blockHeight}`];
                            let amount = 0;
                            for (let o = 0; o < tx.outputs.length; ++o) {
                                amount += tx.outputs[o].amount;
                            }
                            console.log(printDate(header.time)
                                + "  " + amount / 100000000 + " BCH [coinbase]");
                            break;
                        }
                        else {
                            // input is really just a link.
                            let prev = this[`${tx.inputs[i].previousTxid}`];
                            let prevOut = prev.outputs[tx.inputs[i].outputIndex];

                            let header = this[`block${prev.blockHeight}`];
                            console.log(printDate(header.time)
                                + "  " + prevOut.amount / 100000000 + " BCH => "
                                + prevOut.address);
                        }
                    }
                    for (let i = 0; i < tx.outputs.length; ++i) {
                        if (i >= 6) {
                            if (tx.outIndex > i) {
                                console.log("    skipping " + (tx.outIndex - i) + " outputs");
                                i = tx.outIndex;
                            }
                            else if (tx.outIndex < i) {
                                console.log("    " + (tx.outputs.length - i)
                                    + " more outputs not shown");
                                break;
                            }
                        }
                        let str = tx.outIndex === i ? "\t* " : "\t  ";
                        let spentHeight = this[`out${tx.txid}${i}`];
                        if (spentHeight) {
                            let header = this[`block${spentHeight}`];
                            var spent = printDate(header.time);
                        } else {
                            var spent = "unspent";
                        }
                        console.log(str + tx.outputs[i].amount / 100000000 + " BCH => "
                                + tx.outputs[i].address + " (spent: " + spent +")");
                    }
                }
            }
/*
            console.log("Address balance fetched: " + address);
            if (this.total != 0 || this.outputs != 0) {
                console.log("  UTXOs: " + this.unspent + "/" + this.outputs);
                console.log("  Balance: " + this.total / 100000000);
            } else {
                console.log("  empty");
            }
*/
        }
    });
    return promise;
}

Flowee.connect().then(async function() {
    try {
        for (arg in process.argv) {
            if (arg > 1) { // nodejs, skip first two args.
                let result = await listInteractions(process.argv[arg])
            }
        }
    } catch (error) {
        console.log("Error detected: " + error);
    }
    process.exit();
})